Soot blower



B. D. EBY

SOOT BLOWER Oct. 17, 1933.

Filed April 18. 1930 l'IllaVfl/lll^A INVENTOR fra/7 D fby Patented Oct. 17, 1933 UNITED` STATES 1,930,515 y soor BLOWER Ivan D. Eby, Richmond, N. Y. Application April 18, 1930. Serial No.`4 45,257

13 Claims.

The present invention relates to soot blowers and is more particularly directed toward soot blowers adapted for use in high pressure boilers, such asmarine boilers. p

The present Vinvention contemplates a Vsoot blower adapted to occupy one of the iire tubes of the boiler and to be actuated from the front of the boiler without opening the smoke box door or shutting down the furnace. According to the present invention, the soot blower passes through the smoke box door, one of the boiler tubes and into the combustion chamber at the rear of the boiler. The soot blower has a single nozzle adapted to produce a strong oblique jet of steam directed against the rear tube head.

The invention also contemplates a soot blower which has provision for blowing the front tube sheet and the superheater tubes above and in front of the boiler. As the soot blower contemplated by the present invention is to be left in the furnace when not in use, the present invention contemplates the provision of an easy detachable coupling member lby which the soot blower may be coupled to a steam hose connection, designed to permit manual rotation of the pipe and blower head.

The invention also contemplates the provision of suitable means to insure the gradual feeding in. oi the soot blowerv as it is turned in the lboiler tube, this means being in the form of a friction drag carried by the smoke box door.

Other and further objects of the invention will appear as the description proceeds.

The accompanying drawing shows, for purposes of illustrating the invention, one embodiment in which the invention may take form, it being understood that the drawing is illustrative of the invention rather than limiting thesame.

In this drawing:

Figure 1 is a diagrammatic sectional view through a boiler showing the soot blower and 0perating connections in place; v

Figure 2 is a longitudinal sectional view of the soot blower and operating connections with parts broken away;

Figure 3 is an elevational view taken in the direction of the arrow 3 of Figure 1, showing the devices carried by the smoke box door; and

Figure 4 is a central sectional view on the line 4 4 of Figure 3.

In Figure 1 a portion of a conventional marine type boiler is shown. It has a bank of tubes indicated at 10, a combustion chamber 11 at the rear, a smoke box 12 at the front closed by a smoke box door 13, andthe usual superheater 14 above the smoke box.

The soot blowerhead is indicated at 20. This soot blower head may be made of cast steel and is provided with Monel metal venturi 2l of large diameter and set at an angle ofv about 45, so as to create an exceedingly strong concentrated jet of steam to be sent out in an oblique direction. The blower head 20 is threaded as indicated at 22 so as to accommodatea-length of pipe 23. This pipe is long enough to extend beyond the smoke box door, the Vleft end being threaded as indicated at 24 to lit a coupling member 25. It will, ofcourse, be understood that .more than one piece of pipe may be employed with -an ord# inary coupling. f

This pipe 23 is providedwith a hole26 opposite the nozzle 21 and spaced from this nozzle so that the hole will be nearl the front tubesheet when the soot blower head is at the rear of a combustion chamber, as shown in the drawing.l

- The coupling part 25 is turned out as indicated at 27 and threaded at 27 to receive a coupling part 28. These are running threads instead of pipe threads, and the coupling parts 25 and 28 make up against a shoulder 29. The coupling part 28 is threaded at the left, as indicated at 30, to receive a'tube 31. This tube may be made of extra heavy seamless pipe and is turned down to provide shoulders indicated at 32 and 33. This pipe or tube 31 is insertible from the right into a casing or housing 34 having a shoulder 35 engageable with the shoulder 33 on thetube.

The housing 34 has an internally threaded boss 36 for connection with a steam hose 37, and is slightly enlarged, as indicated, so as to form a chamber and `pass the steam to the ports 38 cut in the side walls of the tube 31. The housing 34 is threaded at the right or inner end, as indicated at 39, to accommodate a gland nut 40. This gland nut 40 acts on Va packing ring 41 to force packing'42 down against a retaining ring 43. This retaining ring engages the shoulder 32. The other end of the housing 34 is threaded, as indicated at. 44, to receive a gland nut 45 which acts on a packing ring 46 to force packing 47 down against the shoulder 48'on the housing 34. The pipe 31 extends through the gland nut 45 and carries ansprocket wheel or other turning mechanism, as indicated at 49. The exposed end is pluggedas indicated at 50.

The smoke box door has an opening to accommodate the soot blower. The details oie this` opening and the associated mechanism is shown lin Figures 3 and 4. The plate ofthe smoke box door may be cut with a torch to provide a round .openingv51, and a heavy iron ring 52 is secured to the smoke box door with its center approximately in line with the tube which is to vcarry the soot blower. The ring 52 has a comparatively large opening and is provided at the sides with upwardly extending chocks 53 and `54 adapted to receive lateral extensions 55 and 56 carried by the upper member 57 of a two part ring, the lower part being 58. The lower ring part 58 has side lugs 59 to accommodate bolts 60 threaded into enlargements 61 on the upper ring part 57. Springs 62 tend to hold the two ring parts 57 and 58 close together, as indicated in Figure 3. The lower rear edge of the upper half ring 57 is extended downwardly, as indicated at 63, so as to come behind the lower lplate half 58 and close off the slot between the ring parts when separated far enough to accommodate the pipe. This prevents steam and soot from blowing through into the boiler room. It is, of course, obvious that the lower half of the ring may be the part supported by the iixed ring and that the upper half of the ring may be squeezed against the blower pipe.

In installing the soot blower and the boiler, the blower head and pipe are inserted through the smoke box door and the boiler tube or the blower head threaded onto-the pipe in the combustion chamber. The twopart ring 5'7-58 is secured in place and, at this time, the springs 62 will be tensioned by the -spreading of these two parts. The extent of opening, however, is not suiiicient to move the lower plate beyond the lower edge of the depending projection 63 carried by the upper plate part. These springs 62 squeeze the pipe 23 and make a fairly tight joint all the way about the pipe,rthereby preventing soot from blowing outthrough the opening in the smoke box door. The coupling 25 is secured to the pipe 23 outside the smoke box door and this much of the voutfit may be allowed to remain in the -iurnace with the soot blower head in the position indicated in dotted lines.

When it is desired to blow the boiler, the hose connection 34, with the coupling part 28 carried thereby, is brought into line with the soot blower pipe. The coupling parts easily telescope, and the hand wheel or sprocket wheel 49 is then turned to thread the parts 25 and 28 together. The clamping action of the closure device on the smoke box door-holds the pip'e 23 against rotation so as to permit making up a tight joint.

With the parts inthe dotted line position, steam is turned on and this will cause. a strong jet of steam to blow againstvthe rear tube sheet and a lsmaller jet of steam to blow in the smoke box. VAs the device -isturned,` the jet of steam on the rear tube sheet blows diiferent tubes, and, owing to the reaction of the steam there is a tendency for the soot blower to move toward the, rear of the boiler. This tendency vis resisted by the clamping action oi the devicesV carried b y the smoke box door. This clamping action, however, is not sufficient to prevent the inward movement of `the soot blower but is suiiicient to cause `a gradual threading in of the blower. This threading in or advancing of the sootblowe'r is brought about without any actual threading of the parts. The opening 26 is opposite the nozzle 2l so that there will be no attempt to blow a tube from both directions at once, VThis will cause` a better circulation of steam in the passages and will assist in blowing Vthe soot out'or the Where a number of boilers are in use, fone steam hose connecting device is all that is necessary for the number or" soot blowers, and, this case, the steam hose connection 34 carried from an overhead trolley 'IO etxending kacross the boiler room. When it is desired to remove the hose connection from the soot blower, it is merely necessary to turn the wheel 49 backward. As considerable resistance is offered to the movement of the pipe 23 on account of thesmoke box door, as indicated in dotted lines,

without interference by the soot blower. To do this ktheparts 57 )and 58 may be slipped away from the checks, as the door is partly opened, thereby leaving the large opening in the rings 52.

It is obvious that the invention may be embodied in many forms and constructions, and I wish it to be understood that the particular form shown is but one of the many forms. ,Va-

rious modifications and changes being possible,

I do not otherwise ylimit myself in any way with respect thereto.

What is claimed is: k

l. In coin" ation, aboilerhaving asmoke box door,` s` ie chamber, bank of iire tubes and combustion chamber therear of the re tubes, a sootl blower comprising a .pipe extending from the front of the smoke box rdoor through one of the tubes into the combustion chamber, and a blower head carried by the -,inner end of the pipe and having a nozzle ito create anobligue jet oi lsteam directed toward the rear tube sheet of the boiler, the pipebeing rotatable in the tube and reciprocable along the tube so that the jet of steam from the blower head may be directed toward various parts' of the rear.

tube sheet, the pipe having ahole in the portion thereo in the smoke box adapted to be brought close to the fronttube sheet when the blower ico los

head is in the rear of the combustion chamber, Y

said hole being adapted to emit a strong jet into the smoke box sovas to blow'the front tube sheet and smoke box while the tubes are blown from the rear by the jet from the blower head.

2. In combination, a boiler having a smoke box door, smoke chamber, bank of nre tubes and combustion chamber at the rear of the fire tubes, a soot blower comprising a pipe extending from theY front of the smoke box door through one of the tubes into the combustion chamber, and a blower head carried by the inner end of the pipe and having a nozzle to create an oblique jet of steam directed toward the rear tube sheet of the boiler, the pipe being rotatable in the tube and reciprocable along the tube so that the yjet of steam from the blower head may be directed toward various parts of the rear tube sheet, the pipe having a hole in the portion thereof in the smoke boxadapted to be brought close to the iso front tube sheet when the blower head is in the ing angularly disaligned so that steam and soot '1 may be blown forward through the tubes by the jet from the nozzle without interference by the steam jet in the smoke box.

3. In combination, a boiler having a smoke box door, smoke chamber, bank of re tubes and combustion chamber atthe rear of the fire tubes.

Va soot blower comprising a pipe extending from the front or the smoke box doorthrough one of the tubes into the combustion chamber, and a blower head carried by the inner end of the pipe and having a nozzle to create an oblique jet of steam directed toward the rear tube sheet of the boiler, the pipe being rotatable in the tube and reciprocable along the tube so that the jet of steam from the blower head may be directed toward various parts of the rear tube sheet, the pipe having a hole in the portion thereof in the smoke box adapted to be brought close to the front tube sheet when the blower head is in the rear of the combustion chamber, said hole being diametrically opposite the nozzle and adapted to emit a strong jet into the smoke box so as to blow the front tube sheet and smoke box lwhile the tubes are blown from the rear by the jet from the blower head.

4. In combination, a boiler having a smoke box door, smoke chamber, bank of fire tubes and combustion chamber at the rear of the iire tubes, a soot blower` comprising a pipe extending from the front of the smoke box door through one of the tubes into the combustion chamber, and a blower head carried by the inner end of the pipe and having a nozzle to create an oblique jet of steam directed toward the rear tube sheet of the boiler, the pipe being rotatable in the tube and reciprocable along the tube, a steam hose connection in front of the smoke box door, means for coupling the hose connection to the pipe so that the pipe may rotate relating to the hose connection, and an adjustable friction device carried by the smoke box door to resist the thrust produced by the jet issuing from the blower head.

5. In combination, a boiler having a smoke box door, smoke chamber, bank of iire tubes and combustion chamber at the rear of the re tubes, a soot blower comprising a pipe extending from the front of the smoke box door through one of the tubes into the combustion chamber, and a blower head carried by the inner end of the pipe and having a nozzle to create an oblique jet of steam directed toward the rear tube sheet of the boiler, the pipe being rotatable in the tube and reciprocable along the tube, a steam hose connection in iront of the smoke box door, means for coupling the hose connection to the pipe so that the pipe may rotate relating to the hose connection, and a friction clamp carried by the smoke box door for retarding the longitudinal movement of the pipe as the pipe is turned on its axis to revolve the steam jet.

6. In combination, a boiler having a smoke box door, smoke chamber, bank oi iire tubes and combustion chamber at the rear of the iire tubes, a soot blower comprising a pipe extending from the front of the smoke box door through one of the tubes into the combustion chamber, and a blower head carried by the inner end of the pipe and having a nozzle to create an oblique jet of steam directed toward the rear tube sheet of the boiler, the pipe being rotatable in the tube and reciprocable along the tube, a two part friction collar surrounding the pipe and supported thereby in front of the smoke box door, spring means for squeezing the two parts of the friction collar toward one another to cause the collar parts to grip the pipe, and means coupled to the pipe for rotating the pipe and admitting steam to it.

7. A friction drag for soot blowers employing a rotatable and reciprocable length of pipe leading to a blower head having a nozzle constructed to discharge cleaning iiuid in a direction such that a re-active force is imparted to the pipe in the direction of its length, comprising a stationary abutment, a pair of spring pressed blocks about theY pipe and adapted to grip the pipe, the blocks being disposed in front of the stationary abutment and permitting the gradual threading of the pipe as it is rotated during the time cleaning uid is applied to said nozzle.

8. In combination, a lsoot blower having a rotatable and reciprocable length of pipe leading to an oblique nozzle which produces thrust tending to draw the blower into the fire box of a boiler, and an adjustable friction drag which grips the pipe and resists the thrust sufficiently to insure a gradual threading in of the blower as it is turned.

9. A `smoke box door closure device for soot blowers, comprising a ring adapted to to be carried by the smoke box door in approximate alignment with a boiler tube, a two part plate adapted to close thev opening in the ring and having an opening to accommodate thek pipe of the soot blower, and spring means `to squeeze the plate parts against the blower pipe.

10. A smoke box door closure device for soot blowers, comprising a ring adapted to be carried by the smoke box door in approximate alignment with a boiler tube, a two part'plate adapted to closethe opening in the ring and having an opening to accommodate the pipe of the soot blower, and spring means to squeeze the plate parts against the blower pipe, the ring and plate having cooperative means to support the plate in the absence of a blower pipe.

11. A smoke box door closure deviceY for soot blowers, comprising a ring adapted to be carried by the smoke box door in approximate alignment with a boiler tube, a two part plate adapthaving cooperative means to support the plate in the absence of a blower pipe, the ring having upwardly opening chocks and one of the plate parts having side numbers received in the chocks and adapted to support the ring in the absence of a blower pipe.

l2. In combination, a soot blower having a rotatable and reciprocable length of pipe leading to an oblique nozzle which produces thrust tending to draw the blower into lthe re box of a boiler, and an adjustable friction drag which grips the pipe and resists the thrust sufliciently to insure a gradual threading in of the blower as it is turned, one plate part being extended to be behind the other plate part and close 01T the joint between the plate parts and prevent the blowing ofsteam and soot through the joint.

13. The method of blowing fire tube boilers having a combustion chamber at the rear and a smoke box at the front, which consists in'simultaneously producing revolva'ble jets in both the I. smoke box and combustion chamber disalignedr ict 

